PHP Index

In order to become familiar with PHP programming structures and commands, we will build various PHP pages. Sections of this page will explain each PHP command, provide a link to a working sample, and detail the working sample's PHP code. Let's get started: Else Statements Else statements allow alternatives to PHP if statements. If a condition is false, the else statement will execute. Here's some code: //set the variable to 10 $dollars=10; if ($dollars>20) { print("You have more than 20 dollars!"); } else { print("You don't have more than 20 dollars!"); } The above code evaluates to false, therefore the else statement executes. "You don't have more than 20 dollars!" will display on the browser.

Here's another example:elsestatements.php


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<html>
<title>elsestatements.php</title>
</head>
<body>


<p>My Web 2 students have just taken their PHP test.  
It was very difficult, so I decided to buy my 'A' students new computers. 
All other students get a bag of candy and a pat on the back.  
Here are their scores: </p> 

Mayra 99.9<br>
Lucy 79<br>
Zack 89<br>
Ariel 89<br>
John-Luke 69.9<br>
Miggy 89<br>
Lorenzo 89<br>
Kourtney 70.9<br>


<p>Let's use PHP to display the great news or bad news to each 
student based on their test result.  </p>
<?php
//These are variables to hold the grades
$mayrasgrade=99.9;
$lucysgrade= 79;
$zacksgrade= 89;
$arielsgrade=89;
$johnlukesgrade=69.9;
$miggysgrade=89;
$lorenzosgrade=89;
$kourtneysgrade=70.9;

//Here are the if statements to test 
//whether students scored greater than 89.5 (I round up).
if ($mayrasgrade >89.5)
{
print("Mayra, you get a new computer!<br>");
}
else
{
print("Mayra, better luck next time.  Enjoy the candy, kid.<br>");
}


if ($lucysgrade >89.5)
{
print("Lucy, you get a new computer!<br>");
}
else
{
print("Lucy, better luck next time.  Don't eat it at once.<br>");
}


if ($zacksgrade >89.5)
{
print("Zack, you get a new computer!<br>");
}
else
{
print("Zack, better luck next time.  Don't tell anyone.  The candy is old.<br>");
}


if ($arielsgrade >89.5)
{
print("Ariel, you get a new computer!<br>");
}
else
{
print("Ariel. better luck next time, and leave Joya alone.<br>");
}


if ($johnlukesgrade >89.5)
{
print("John-Luke, you get a new computer!<br>");
}
else
{
print("John-Luke, better luck next time.  Sorry I'm out of candy.<br>");
}


if ($miggysgrade >89.5)
{
print("Miggy, you get a new computer!");
}
else
{
print("Miggy, better luck next time.  Ask John-Luke for your candy.<br>");
}


if ($lorenzosgrade >89.5)
{
print("Lorenzo, you get a new computer!<br>");
}
else
{
print("Lorenzo, better luck next time.  Here's the last of my  new candy.  Don't tell anyone.<br>");
}

//Check this out!  You can add other conditions using elseif!

if ($kourtneyscosgrade >89.5)
{
print("Kourtney, you get a new computer!<br>");
}
elseif ($kourtneysgrade > 79.5)
{
print("Kourtney, you get a new computer book!");
}
elseif ($kourtneysgrade > 69.5)
{
print("Kourtney, you get a new pencil!");
}
else
{
print("Kourtney, better luck next time.  <br>");
}


?>

</body>
</html>


</body>
</html>